Add --wrap_after option for wrapping identifier lists.

[fimmtiu]

This pull request adds a new option, --wrap_after, which defines a column limit which it'll try not to exceed when printing identifier lists. Instead of printing each identifier in the query on its own line (very annoying for IN clauses or SELECTs for many columns!), it keeps printing them on the same line until it goes past the wrap_after amount, at which point it inserts a newline.

Before:

SELECT DISTINCT `foos`.`bar_id`
FROM `foos`
INNER JOIN `bars` ON `bars`.`id` = `foos`.`bar_id`
LEFT JOIN `honks` ON `honks`.foo_id = foos.id
LEFT JOIN `bonks` ON `bonks`.id = `honks`.bonk_id
WHERE `foos`.user_id IN (912034523,
                         912611173,
                         912611177,
                         912611179,
                         912611191,
                         912611201,
                         912611211,
                         912611397,
                         912059323,
                         912096413,
                         912101453,
                         912103173,
                         912106635,
                         912116235,
                         912481421,
                         912482243,
                         912560941,
                         912636990,
                         912637838)
  AND `honks`.type = 99
  AND bonks.state IN (1,
                      2,
                      3,
                      4)
  AND (`bars`.group_id IN (31331,
                           31333))
  AND (monkey_id IS NOT NULL
       AND bars.group_id IS NOT NULL
       and LENGTH(bars.description) > 0)
  AND `bars`.`enabled` = 1;

After (using --wrap-after=80):

SELECT DISTINCT `foos`.`bar_id`
FROM `foos`
INNER JOIN `bars` ON `bars`.`id` = `foos`.`bar_id`
LEFT JOIN `honks` ON `honks`.foo_id = foos.id
LEFT JOIN `bonks` ON `bonks`.id = `honks`.bonk_id
WHERE `foos`.user_id IN (912034523,912611173,912611177,912611179,912611191,912611201,
                         912611211,912611397,912059323,912096413,912101453,912103173,
                         912106635,912116235,912481421,912482243,912560941,912636990,
                         912637838)
  AND `honks`.type = 99
  AND bonks.state IN (1,2,3,4)
  AND (`bars`.group_id IN (31331,31333))
  AND (monkey_id IS NOT NULL
       AND bars.group_id IS NOT NULL
       and LENGTH(bars.description) > 0)
  AND `bars`.`enabled` = 1;

[fimmtiu]

Addendum: Just wanted to say how useful this tool is, and how easy it was to read and modify your code. Thanks very much!

[andialbrecht]

woot! Thanks! That was an often requested feature!